Have you looked into Microsoft Business Productivity Suite?

“We have SBS 2003 today at the home office, and we are seriously considering to move to WHS and some kind of email solution in the cloud. The only thing I haven’t found yet in the cloud is Exchange Push email to our Windows Mobile HTC’s phones. The price of SBS 2008 with Trend’s WFBS makes you consider other options.”

Interesting…So much for trying to sell SBS and get a MSP contract signed with it. Why should my clients buy SBS and get an MSP contract from me when Microsoft can do it from the Cloud for A LOT less than having SBS and an MSP contract? This is really scary.